Mine-door.



No. 808,125. PATENTED DECJZB, 1905.

A. G. URBAN.

MINE DOOR.

APPLICATION FILED MAYIZ. 1905.

m hwoaaa UNITED STATES PATENT OFFICE.

ALFRED O. URBAN, OF BUXTON, IOlNA, ASSIGNOR OF ONE-HALF TO NATHAN P. HERRINGTON AND ONE-FOURTH TO ERIC F. BROWN,

OF BUXTON, IOWA.

MINE-DOOR- Specification of Letters Patent.

Patented Dec. 26, 1905.

Application filed May 12, 1905. Serial No. 260,112.

To all whom it may concern.-

Be it known that I, ALFRED C. URBAN, a citizen of the United States, residing at BuX- ton, in the county of Monroe and State of Iowa, have invented certain new and useful Improvements in Mine-Doors, of which the following is a specification.

This invention embodies improved means of that type of operating mechanism designed particularly for opening and closing doors in entries, drifts, or passages of mines.

The main feature of the invention resides in the provision of mechanism of this class of a simplified nature which will be automatically operated by the cars approaching the door and which is particularly advantageous in that it will work successfully where located at a curve in the drift or passage, this being essential to a practical device of this kind.

For a full description of the invention and the merits thereof and also to acquire a knowledge of the details of construction of the means for effecting the result reference is to be had to the following description and accompanying drawings, in which Figure 1 is a top plan view of the mechanism embodying the invention, the view illustrating such mechanism arranged in a drift or passage in a mine in operable relation to the mine-door. Fig. 2 is a detail perspective view of the pressure-bar in the path of movement of the rolling-stock and which cooperates with the door-locking means. Fig. 3 is a view in elevation, showing the truck of a car in the position assumed thereby as it approaches the pressure-bar after the door or doors have been opened under the actuation of the door-opening mechanism. Fig. 4 is a view similar to Fig. 3, the truck being in engagement with the pressure-bar and the detent thrown out of operation. Fig. 5 is a detail perspective view of the shaft carrying the trip-arm and the crank-arm which connects with the door. Fig.6 is a front elevation of the engaging member and detent, which separately cooperate with the door in holding the same open.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

In carrying out the invention and specifically describing the structure illustrated in the drawings, the numeral 1 indicates the drift or passage in which the operating mechanism comprising the invention is located. This passage is provided with the usual track, the rails of which are indicated at 2, over which travel the cars which convey the mine material through such drift or passage. At a suitable point in the passage 1 is located the frame 3, in which the mine door or doors are mounted, and in this instance it is preferred to provide double doors 4, horizontally or otherwise mounted in the frame 3 in such a manner as to answer the purposes of the invention. A horizontal bracket 5 projects laterally from the upper portion of one of the doors 4, and a rod 6 connects this bracket with the other door, so that the doors will be simultaneously operated in opening and closing. It will be obvious that either a single or double door may be used within the contemplation of the invention. The doors 4 are normally held closed by means of springs i7 lor similar. devices, such as weights or the At opposite sides of the doors 4 and situated at a suitable distance therefrom in the passage 1 are mounted vertical shafts 8, carried in suitable hearings in a substantial support provided therefor. Each of the shafts 8 is provided at its upper portion with an arm 9, which extends laterally therefrom above the track 2, being arranged in the path of movement of the cars which approach the mine-doors from either direction. The front portion of the car is adapted to strike the arm 9, so as to turn the shaft 8, and a crankarm 10, projecting from said shaft 8, is operably connected with the doors 4, so that when the arm 9 of either shaft is operated by a moving car the doors will be turned open. The connections between the arms 10 and the doors 4 are indicated at 11 and 12, respectively, and said connections preferably consist of ropes or wires, one end of each of which connects directly with a door 4, the opposite end being connected with a spring 13, the latter directly attached to an arm 10. It is obvious that rods or like connections may be substituted for the rope 1 1 but when wires or ropes are used said flexible connections pass about suitable pulleys in the length of the track. The connection 11 extends directly to the doors 4, to which it is connected, but the connection 12, which is upon the opposite side of the doors, extends beyond the door-frame and about a pulley 14, and thence back again to its point of connection with the door 4, with which it cooperates, the above arrangement being necessary, so that said doors 4 may be pulled open by said connection 12.

It is designed that the cars approaching the doors 4 from either direction initially actuate said doors to open the same, cooperating with the arms 9 before described, and after the doors have been opened the same are held in said open position by special means which has been devised for this purpose. This last-mentioned means embodies a pressure-bar 15, which is arranged longitudinally of the track at one side thereof and which is adapted to come in contact with the truck of a car as the latter approaches the same. The bar 15 is located upon one side of the doors 4 a short distance therefrom and is carried by the upper ends ofstandards 16, pivotedat th lower em i as hOW 95 1 1110 16 of the t n ar s: 1 4 onn c ed bylink 8 with the crank-arm 19 Qfa'shaft 20, disposed adjacent the bar 15-;in longitudinal "aline ment therewith, I The shaft 20 is arranged in suitable supporting bearings, and said shaft carries two doorholding membersnamely, the engaging member 21 and a de-;

tent 22, pivoted tesaid engaginginember 21. The engaging-member 21 preferably consists of a wheel having a lug 23', extending therefrom and 7 adapted to engage one: of I the doors 4 in order to hold the same in open po-j sition, and it -will of course be understood that when one door is held open theconnecr tionbetween the doors 4 will cause the other door to remain open-also.

shown at 24, to the upper portion of the wheel of the engaging member'21, and his preferred that this detent shall be sufficiently heavyat its lower end to hold its upper end in a positionin the path of movement'of the ment or travel of the cars bymeans of springs 25, connected with the crank-arms 10. 1 As the car approaches from the direction indicated by the arrow A the front of said car will strike the arm 9 at one side of the doors 4' and force said arm toward the doors, increasing the tension of the springs 13 and operating upon the connection 11, connected therewith. The provision of the springs 13 in the length of the connections 11 and 12 relieves said connections of theshock or strain which would otherwise be incident to the sudden The detent 22 consists of a dog pivoted between its ends, as

When

movement of the arms 9 when actuated by a car engaging the same, the doors 4 being also relieved of shock or jar which would otherwise be incident to their opening movement. When the doors are turned 0 en, one of said doors strikes the detent 22, ti ting the same and passing thereover, said detent swinging back and engaging the door, as shown most clearly in Fig. 3 of the drawings. The car-truck now engages the pressure-bar 15 and forces the same laterally by pivotal movement thereof, causing the arm 19 to actuate the shaft 20 in such a manner that the pivot 24 is shifted, causing the upper engaging end of said detent to be drawn beneath the door and bringing the lug 23 of the" engaging member 2 1 into engagement with the door. The constant pressure exerted by the truck of the car against the bar 15 holds the lug 23 .in engagement with the door 4, with whichit cooperates, and the doorsare thus held pen'unt l the ar r ars h vepa dt e m 1 L5; Whereuponthe pressure; against saidibar ibeing "relieved the same is returnedby" its weight or other'means to its'normal position doors" toficlosesimultaneously. -When the 1 in the pathof travel of the cars and the lug 23 is forcedtoward the adj acentrail2, and so disengaged from the ;door4, permitting both tion to that indicated bythe arrow A, the

arm 9 upon the-'nearside 'of the door is actuated; and theconnection 12 pulled u on so as to open bothdoors 4-, substantial y in the manner described above. 'One of the doors is engaged by thefdetent 22 as soon as both of the doors are 1open, and-when the car passes through the doorsthe same engages the pres-' sure-bar-15, as described'above, and actuates the parts; 22 and 21, and then as the carmoves away from the pressure-bar-the latter is returned to its normalposition, permitting. closing of the doors in anobvious manner.

7 The member'18 may have adjustable connection withthe standard 16, to which it'is attached, said standard being provided with a plurality of openings 16, through which the fastenings employed may be passed.

Having thus described the invention, what isclaimed as new, and desired to be secured by'Letters Patent, is

1. In operating mechanismformine-doors, the combination of a door, means for actuating the same, a pressure-bar operable by an approaching car, a shaft,;an operative connection between the shaft and the pressurebar, a door-engaging member mounted on said shaft, a detent carried by said door-engaging -member for engagement with the door, and means permitting operation of the detent independently of the door-engaging member aforesaid. 1

2. In operating mechanismfor mine-doors, the combination of a door, means for actuating the same, a door-engaging member, a detent pivoted to said door-engaging member and shiftable thereby, and means for actuating the door-engaging member and this degent to effect cooperation thereof with the oor.

3. In operating mechanismfor mine-doors, the combination of a door, means actuating the same, a ivoted detent and means for shifting the plvot of said detent to throw the same out of cooperation with the door.

4. In operating meohanismfor mine-doors, the combination of a door, means for actuating the same, a pressure-bar adapted to be ALFRED C. URBAN.

Witnesses:

JOHN F. LACEY, LENA L. ROWE. 

